iWave iW-RainboW-G22M, Hardware User'S Manual

Page: 19 / 62

REL1.2
Page 19 of 62
RZ/G1E SODIMM SOM Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
2.7.1 Gigabit Ethernet
The RZ/G1E SODIMM SOM supports one 100/1000 Mbps Ethernet interface on SODIMM Edge connector. The MAC
is integrated in the RZ/G1E CPU and connected to the external Gigabit Ethernet PHY on SOM. Since MAC and PHY are
supported on SOM itself, only Magnetics are required on the carrier board. RZ/G1E SODIMM SOM also supports Link
and Activity indication LED control signals to SODIMM Edge.
The RZ/G1E SODIMM SOM supports “KSZ9031MNX” Ethernet PHY from Microchip. This PHY is interfaced with
RZ/G1E CPU EtherAVB and works at 3.3V IO voltage level. Since this PHY doesn’t recommend to connect any power
source to magnetic center tap pins, CTREF voltage to SODIMM Edge is not supported on SOM. It is recommended
that center tap pins of magnetics should be separated from one another and connected through separate 0.1uF
common mode capacitors to ground. The below table provides some of the compatible magnetics recommended by
the PHY Manufacturer.
Table 4: Gigabit Ethernet Compatible Magnetics
Part Description Part Number Manufacturer Temperature
Gigabit Ethernet Discrete Transformer TG1G-E001NZRL HALO -40°C to 85°C
Gigabit Ethernet Discrete Transformer HX5008NL Pulse -40°C to 85°C
RJ45 Magjack with two Green LED JK0654219NL Pulse 0°C to 70°C
RJ45 Magjack with two Green LED 0826-1G1T-23-F Bel Fuse 0°C to 70°C
For more details, refer SODIMM Edge connector pins 2, 4, 6, 8, 11, 12, 14, 15, 16 & 17 on Table 6.
Note: EtherAVB MAC of RZ/G1E CPU doesn’t support 10Mbps speed.
2.7.2 10/100 Ethernet (Optional)
The RZ/G1E SODIMM SOM optionally supports one 10/100 Mbps Ethernet interface on SODIMM Edge Connector.
The MAC is integrated in the RZ/G1E CPU and connected to the external 10/100 Ethernet PHY on SOM. Since MAC
and PHY are supported on SOM itself, only Magnetics are required on the carrier board. RZ/G1E SODIMM Edge
connector also supports Link and Activity indication LED control signals.
The RZ/G1E SODIMM SOM supports “KSZ8081RNBI” Ethernet PHY from Microchip. This PHY is interfaced with
RZ/G1E CPU EtherMAC and works at 3.3V IO voltage level. Since this PHY doesn’t recommend to connect any power
source to magnetic center tap pins. It is recommended that center tap pins of magnetics should be separated from
one another and connected through separate 0.1uF common mode capacitors to ground. The below table provides
some of the compatible magnetics recommended by the PHY Manufacturer.
For more details, refer SODIMM Edge connector pins 30, 33, 34, 35, 36 & 37 on Table 6.